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Thread: MPVI2 write error

  1. #1

    MPVI2 write error

    hi guys im new to the tuning world im having issues writing back to the ecm after making a minor change, all I wanted to do is turn the vats off so I could just make the ecm and harness stand alone. I can read the ecm and open it up, but when I go to write it back it just gives me a fail and timed out. any help would be much appreciated. thank you.

  2. #2
    Tuning Addict 5FDP's Avatar
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    May 2012
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    Rogers, MN
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    13,533
    What kind of vehicle?
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
    the motor is from a 2001 suburban 2500 with a 8.1l I put it in a 2003 Silverado 2500hd originally had a 6.0L in it. just want to turn vats off and write tune back to ecm. It will say writing then pop up with the timer and stay at 0 min and hours, than just says fail. tried with a bench harness also same results.

  4. #4
    HP Tuners Support
    (foff667)
    Bill@HPTuners's Avatar
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    Jun 2004
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    Hailing from Parts Unknown
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    28,247
    you'll need to open a support ticket for further assistance.
    It doesn't have to be perfect, it just needs to be done in two weeks...

    A wise man once said "google it"

  5. #5
    Potential Tuner
    Join Date
    May 2020
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    6
    I had problem with write to ECM on my Mercedes GLA45 too, read ok but when write calibration back it fail to erase. Tech support working on it, still no solution yet.